Remove StorageManager#mountAppFuse hidden API.

The API should be replaced with StorageManager#openProxyFileDescriptor.

Bug: 32891253
Test: build
Change-Id: Ibbf8b64f3a39900a1f05a52132aa931491d6fd48

core/java/android/os/storage/IStorageManager.aidl

@@ -286,7 +286,6 @@ interface IStorageManager {
     void prepareUserStorage(in String volumeUuid, int userId, int serialNumber, int flags) = 66;
     void destroyUserStorage(in String volumeUuid, int userId, int flags) = 67;
     boolean isConvertibleToFBE() = 68;
-    ParcelFileDescriptor mountAppFuse(in String name) = 69;
     void addUserKeyAuth(int userId, int serialNumber, in byte[] token, in byte[] secret) = 70;
     void fixateNewestUserKeyAuth(int userId) = 71;
     void fstrim(int flags) = 72;

core/java/android/os/storage/StorageManager.java

@@ -1318,16 +1318,6 @@ public class StorageManager {
         return path;
     }
 
-    /** {@hide} */
-    public ParcelFileDescriptor mountAppFuse(String name) {
-        try {
-            return mStorageManager.mountAppFuse(name);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
-        }
-    }
-
-
     /** {@hide} */
     @VisibleForTesting
     public @NonNull ParcelFileDescriptor openProxyFileDescriptor(

services/core/java/com/android/server/StorageManagerService.java

@@ -2991,38 +2991,6 @@ class StorageManagerService extends IStorageManager.Stub
         }
     }
 
-    @Override
-    public ParcelFileDescriptor mountAppFuse(final String name) throws RemoteException {
-        try {
-            final int uid = Binder.getCallingUid();
-            final int pid = Binder.getCallingPid();
-            final NativeDaemonEvent event =
-                    mConnector.execute("appfuse", "mount", uid, pid, name);
-            if (event.getFileDescriptors() == null) {
-                throw new RemoteException("AppFuse FD from vold is null.");
-            }
-            return ParcelFileDescriptor.fromFd(
-                    event.getFileDescriptors()[0],
-                    mHandler,
-                    new ParcelFileDescriptor.OnCloseListener() {
-                        @Override
-                        public void onClose(IOException e) {
-                            try {
-                                final NativeDaemonEvent event = mConnector.execute(
-                                        "appfuse", "unmount", uid, pid, name);
-                            } catch (NativeDaemonConnectorException unmountException) {
-                                Log.e(TAG, "Failed to unmount appfuse.");
-                            }
-                        }
-                    });
-        } catch (NativeDaemonConnectorException e) {
-            throw e.rethrowAsParcelableException();
-        } catch (IOException e) {
-            throw new RemoteException(e.getMessage());
-        }
-    }
-
-
     class CloseableHolder<T extends AutoCloseable> implements AutoCloseable {
         @Nullable T mCloseable;